Prostate Cancer Biochemical Recurrence Resulted Negative on [ 68 Ga]Ga-PSMA-11 but Positive on [ 18 F]Fluoromethylcholine PET/CT.

For prostate cancer (PCa) biochemical recurrence (BCR), the primarily suggested imaging technique by the European Association of Urology (EAU) guidelines is prostate-specific membrane antigen (PSMA) positron emission tomography/computer tomography (PET/CT). Indeed, the increased detection rate of PSMA PET/CT for early BCR has led to a fast and wide acceptance of this novel technology. However, PCa is a very heterogeneous disease, not always easily assessable with the highly specific PSMA PET with around 10% of cases occuring without PSMA expression. In this paper, we present the case of a patient with PCa BCR that resulted negative on [ ⁶⁸ Ga]Ga-PSMA-11 PET/CT, but positive on [ ¹⁸ F]Fluoromethylcholine (Choline) PET/CT.